audio flinger: rename Bluetooth latency mode APIs

Rename APIs controlling Bluetooth variable latency
after API review suggestions.

Bug: 257922898
Test: make

Merged-In: I517ad9c6aef14975c9e0a1a2703d1b17d638ea0e
Change-Id: I517ad9c6aef14975c9e0a1a2703d1b17d638ea0e
diff --git a/services/audioflinger/Threads.h b/services/audioflinger/Threads.h
index 8a29dbf..bb42f22 100644
--- a/services/audioflinger/Threads.h
+++ b/services/audioflinger/Threads.h
@@ -1086,7 +1086,7 @@
                     return INVALID_OPERATION;
                 }
 
-    virtual     status_t setBluetoothLatencyModesEnabled(bool enabled);
+    virtual     status_t setBluetoothVariableLatencyEnabled(bool enabled);
 
 protected:
     // updated by readOutputParameters_l()